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  • Questions about vray proxies

    I've got a scene with 100 shrubs in it. I placed the actual geo of the plants first. Now the scene is very sluggish so I'm thinking about replacing them with vray proxies.
    I have a couple questions about that though.

    1. There are only three plants. Each appears about 33 times in the scene. Would it be quick to take all the instance of plant #1 and replace each instance of the plant with the same vray proxy file, then do the same for plant #2 and #3? Or should I just select all the plants together and create one vray proxy for everything?

    2. If I wanted to replace all of a specific plant in my scene with a vray proxy, is there an easy way to do that in bullk so that it will replace each plant with a proxy and match the plants position, rotation and scale? I tried maya's "replace object" tool and it didn't seem to work, at least with vray proxies.

    3. We were having a discussion in the office here. Do vray proxies speed up the render? Or is it only fox optimizing scene/viewport performance? I googled that same question and got conflicting answers. Some said yes, it speeds up the render. Others said no. Still others said it will actually slow down the render. What's the verdict from chaos group?

    Thanks!

  • #2
    #1 and #2 are more on the Maya side of things, so I can't help with that too much; for #3, proxies were not originally designed to speed up rendering, but to reduce RAM usage and make the scenes lighter in the viewports when you have very heavy geometries. Render times with proxies can be slightly faster or slightly slower (I've seen both).

    If you just want your viewports to be faster you may look at something like the Maya GPU cache.

    Best regards,
    Vlado
    I only act like I know everything, Rogers.

    Comment


    • #3
      In my scene, I've proxied a 7 mil poly mesh and it takes 5 times longer to render, so I would not recommend using proxies on large meshes at render time.

      Comment


      • #4
        Hm, do you think you can share the scene? 5 times slower seems quite excessive.

        Best regards,
        Vlado
        I only act like I know everything, Rogers.

        Comment


        • #5
          Originally posted by vlado View Post
          Hm, do you think you can share the scene? 5 times slower seems quite excessive.

          Best regards,
          Vlado
          Hi Vlado, I have permission to send you it but it will have to be covered with NDA as it's an offshore oil rig

          Is this fine?

          Comment


          • #6
            Yes, this is fine - my email is vlado@chaosgroup.com

            Best regards,
            Vlado
            I only act like I know everything, Rogers.

            Comment


            • #7
              @Vlado

              Hi Vlado, I've just sent the scene, the render times I got with the exact same settings was

              Proxy = 32 min 13.4s
              Mesh = 4m 33s

              Cheers.

              Comment


              • #8
                Use Mays Scene Assembly, no limit to your scene contents, you can switch between different object display. You can have your objects saved out as a Cache object - greyscale no textures - low poly - full textured, what ever you want even vray proxies. I built a whole village with this including all the trees. What I liked was the fact you could also marque select a bunch of objects in the viewport and switch there display type in one go. Perfect for massive scenes.

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                • #9
                  Originally posted by vlado View Post
                  Yes, this is fine - my email is vlado@chaosgroup.com

                  Best regards,
                  Vlado
                  Hi Vlado, any news on this?

                  Cheers.

                  Comment


                  • #10
                    The result so far is that in the latest nightly builds there are some optimizations for proxies, with more on the way.

                    Best regards,
                    Vlado
                    I only act like I know everything, Rogers.

                    Comment


                    • #11
                      Great, thanks for the update.

                      Cheers.

                      Comment

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